Corn and cob mill



f i UNITED STATES NPATENT onirica.

f at

HARVY HALL, OF MANSFIELD, OHIO.

CORN AND Specification of Letters Patent No.

To all whom t may concern:

Be it known `that I, HARVY HALL, of Mansfield, in the county of Richlandand State of Ohio, have invented anew and Improved Corn and Cob Mill;and I do hereby.. declare that the following is a full and exactdescription thereof,` reference being had to the accompanying drawingsand to the letters of reference markedV thereon.

Corn and cob mills, consisting of an internalcone and` acorrespondingexternal shell, as heretofore constructed are attended with severaldefects and difficulties whiclr manufacturers have endeavored in vain toovercome. Uniformity of grinding is and can be attained only by usingperfectly parallelv surfaces, with a true uniform di-` vergence.

It is not difficult, in this kind of mills, toi

obtain a true circle, parallel surfaces or` uniform divergence, but thedifficulty is to keep them so. This difficulty arises from the manner ofapplying the power to the shell, and the manner of resisting it, and,vice versa. The effect always is to producej a hard and unsteady draft,meal of uni equal neness, and frequently the loss ofi the mill bybreaking. Ofcourse these effects;

`are not observable when the corn and cobs are in a soft condition, butwhen the corn becomes dry and the cobs hard and stiff, the resistance isso great that it is impossible, by any invention prior to mine, to keep?the cone and shell in proper relative position. On one side the grindingsurfaces will be forced in contact, while on the otheri side they willbe forced too wide apart, hence the evils enumerated.

Another difficulty is the irregular feeding occasioned by the coarsenessof the ears of corn, which not only impede each others progress in thehopper, but frequently bridge the ent-ire space between the arms of theshell, and then suddenly falling in pro-j duce a great strain upon thecob-breakers on that side,`and thereby disturb the equilib` rium of thedraft and thevparallelism of the grinding surfaces.

The object of my invention is to overcome these difficulties. And aftermaking and trying many forms of mills, I am confident that I havesucceeded in constructing a mill that remedies the old evils withoutbeing attended by new ones.

The difficulties relating to the shell and the cone might be obviated byincreasing the COB MILL.

18,844, dated December 15, 18517.

amount of metal to such an extent as to en-W.

gained in relation to the shell', by making.

the horse shafts or levers in such a manner as to embrace the shell andrender lits action' equal on all sides, as-will be `understood byreference'pto the description below and the drawings.

The difficulties relating to the cone are vobviated in my mill bycasting the meal trough solid to the cone at its` base and within threeinches of thepoint of greatest pressure, presenting its broad fiatbottom edgewise to the pressure and forming an a arch or wheel,receiving the pressure in the direction of rim to center; beingstrength- `ened also by the side'of the meal trough which is as a Bangetothe wheel; Andjit is still further strengthened by the manner of y itsattachment to the top of the circular pedestal, bringing all itsstrength (which is equal or superior to the trough and oft-he same form)to resist thepressure from the My invention consists in strengtheningthea, A

Vcone -without an increase of metal, thus making a better mill at` amuch less expense by casting the cone and troughin one piece; and alsoin the combination of a stationary Vcob-cutter with the cutting edgesupon the Vfront of the revolving arms of the shell of the mill, forcutting cobs, regulating the feed-diminishing the power required andincreasing the rapidity of the grinding.

In the accompanying drawings Figure l, represents the mill as arrangedfor employing horses, with a part of the hopper `B,`broken off to showthe two sets of` cob-breakers ma, `and E, E. Fig. 2, representsthecob-cutter F` and` the arms D, the latter being broken away from theshell withwhich they are cast. Fig. 3 shows the cone of the mill and themanner of connecting it with the pedestal. Fig. 4, is a section of theworking part of the mill. Figs. 5 and 6 showr parts hereafter explained.

In operating my mill the shell A, Fig. 1, is turned around, while thecone L, remains stationary, resting firmly upon the pedestal P, and feetQ, whiclrare bolted to a plat- CaSe.

vheld by screws'. chilled or hard white iron, in order to en?k form.`The shell A is cast in the same piece with the arms D, D, which have aseries of cob-breakers E, E. The hopper B, is riveted to the shell A, sothat both hopper B, and arms D D revolve with the shell. Upon the frontof the arms D D is a shear edge, as seen in FigkQ, at D. As the shell Aand arms D, revolve, the shear edges eZ, pass under a correspondingshear edge upon the stationary armor cob-cutter F, for the purpose ofproducing a shear cut which divides the hardest Years of corn withcomparative The eflect of this shear cut is notronly to lessen the powerrequired to drive the mill and prevent the cob-breakers n, and E, frombeing broken, but the feeding of the mill is more'uniform and complete,consequently the mills grind faster.

' The cone L, Fig. 3, andthe meal trough M, are cast in one piece; sothat the meal troughserves the threefold purpose 'of receiving the meal,ofgiving a broad basefor fastening the cone to the pedestal, and aboveall, of strengthening the cone without any increase of metal.`Thefbottom of the meal trough M, Fig. 3, has a projection m, whichvfits into a channel on the upper side of ring Ymanner the shell A, Fig.4, is armed with cob-breakers E, also with floats or coarse teeth C, anda separate grinding ring G, These rings are made of dure the wear, andbeing removable they may be replaced by coarse or fine rings or new onesat pleasure.

` The cob-cutter F, Fig. 4,` is supported by the stationary washer ornut N, which is held to its place by a screw bolt, seen in Fig. 4, atwhich passes through the spindle Z, to meetV a nut .e inthe cavity ofthe cone. The nut e when brought home is prevented from turning byfitting a socket in the'cavity of the cone, and the washer or nut N isin like manner prevented from turning by fitare cast with the shell ofthe mill.

ting upon the square topl of the spindle Z. The screw bolt turns freelyin both the spindle Z and the washer N, by means of the a series offloats or meal carriers z', which sweep the meal trough M, bringing themeal to the hole o Fig. 5, where the meal falls from the mill. At' theunder edge of the yring is a flange R, Figs. 4 and 5, projectingdownward and embracing the outer lips of the meal trough. In Fig. l, areshafts W, IV, connected by cross-bars Y, Y, and pins f, f, and heldfirmly in place by bracing rods g, g, which may be tightened at pleasureby means of screws and nuts y', placed at the hooks L, z.. The shaftsfit upon lugs which By this arrangement the shafts form a completelyfirm frame which, by acting equally upon bothrsides of the shell, movesit uniformly,

uponthe cone and prevents any side pressure tending to separate theshell and cone on one side, and bring them in contact on the other.

The advantages of my mill are: 1. The cone is incapable of springing andis/held rmly in place. 2. The feeding is more complete and uniform thaneven when. an arm is used instead of the cob-cutter, and the strain uponthe cob-breakers being relieved,.less power is required to drive themill. The shafts render the action of the shell equal upon all sides,preventing the irregular wearing of the mill and producing meal ofuniform iineness.

Having thus fully described my invention what I claim and desire tosecure by Letters Patent of the United States is:

The cone and meal-trough, cast in one piece, for the purpose ofstrengthening the cone, andv giving a firm base for its attachment asset forth.

HARVY HALL. Witnesses:

EDW. F. BROWN, DANIEL BREED.

